fittingSize()

main/Common Classes/SlideInAnimation.swift

@@ -172,18 +172,10 @@ private class StickyPresentationController: UIPresentationController {
 		let preferred = presentedViewController.preferredContentSize
 		switch stickTo {
 		case .left, .right:
-			let fitted = target.systemLayoutSizeFitting(
+			let fitted = target.fittingSize(fixedHeight: full.height, preferredWidth: preferred.width)
-				CGSize(width: preferred.width, height: full.height),
-				withHorizontalFittingPriority: .fittingSizeLevel,
-				verticalFittingPriority: .required
-			)
 			return CGSize(width: min(fitted.width, full.width), height: full.height)
 		case .top, .bottom:
-			let fitted = target.systemLayoutSizeFitting(
+			let fitted = target.fittingSize(fixedWidth: full.width, preferredHeight: preferred.height)
-				CGSize(width: full.width, height: preferred.height),
-				withHorizontalFittingPriority: .required,
-				verticalFittingPriority: .fittingSizeLevel
-			)
 			return CGSize(width: full.width, height: min(fitted.height, full.height))
 		}
 	}

main/Extensions/View.swift

@@ -17,6 +17,18 @@ extension UIView {
 			return UIImage(cgImage: image!.cgImage!)
 		}
 	}
+	
+	/// Find size that fits into frame with given `width` as precondition.
+	/// - Parameter preferredHeight:If unset, find smallest possible size.
+	func fittingSize(fixedWidth: CGFloat, preferredHeight: CGFloat = 0) -> CGSize {
+		systemLayoutSizeFitting(CGSize(width: fixedWidth, height: preferredHeight), withHorizontalFittingPriority: .required, verticalFittingPriority: .fittingSizeLevel)
+	}
+	
+	/// Find size that fits into frame with given `height` as precondition.
+	/// - Parameter preferredWidth:If unset, find smallest possible size.
+	func fittingSize(fixedHeight: CGFloat, preferredWidth: CGFloat = 0) -> CGSize {
+		systemLayoutSizeFitting(CGSize(width: preferredWidth, height: fixedHeight), withHorizontalFittingPriority: .fittingSizeLevel, verticalFittingPriority: .required)
+	}
 }
 
 extension UIEdgeInsets {